Flue-cutter



(No Model.)

J. FITZPATRIOK.

FLUE CUTTER.

&

M 5 m 5 2 A DH 0 T N E V W ATTORNEYS.

WITNESSES:

UNITED STATES P TENT @FFICE.

JEREMIAH FITZPATRIOIQ'OF BATON, TERRITORY OF NEW MEXICO.

FLU E-CUTTER.

SPECIFICATION forming part of Letters Patent No. 565,850, dated August11, 1896.

Application filed OGtOhGI 9, 1895- Serial N- 565,138| (N0 model.)

$0 a whom, it may concern.-

Be it known that I, JEREMIAH FITZPATRICK, of Baton, in the county ofColfax and Territory of New Mexico, have invented a new and ImprovedFlueCutter, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improvedflue-cutter, which is simple and durable in construction, very eifectivein operation, and arranged to properly cut the flue inside of theflue-sheet of the boiler for conveniently withdrawing the out parts ofthe flue.

The invention consists of certain parts and details and combinations ofthe same, as will be fully described. hereinafter, and then pointed outin the claim.

Reference is to be had to the accompanying drawings, formingapart ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of the improvement. Fig. 2 is a centrallongitudinal sectional view of the same, and Fig. 3 is a transversesection of the same on the line 3 3 of Fig. 2.

The improved flue-cutter is provided with a cylinder A, the outsidediameter of which is somewhat less than the interior diameter of theflue to be cut, and on said cylinder A is formed or secured a collar B,adapted to abut against the outer end of the flue. In the forward end ofthe cylinder A is arranged a transverse opening, diagonally disposedwith relation of the axis of the cylinder, and formin g a guideway A, inwhich is fitted to slide a carrier 0, in which is journaled a circularcutter D, adapted to cut the flue from the inside as the carrier 0 ismoved outward. The cutter Chas a straight side from edge to edge,parallel with the walls of guideway A, and its opposite side is beveledto an edge. A spring 0, secured in the forward end of the cylinder A,presses on the carrier 0, so as to hold the latter normally in aninnermost position, and to return said carrier to an innermost positionafter the flue is cut.

The carrier 0 is provided with an opening 0, through which passes awedge F, mounted to slide longitudinally in the bore of the cylinder A,so as to move the carrier 0 outward against the tension of the spring E.The

wedge F is provided at its base end with a socket F, in which is mountedto turn the grooved end G of afeed'screw G, carrying at its outer end ahandle H for conveniently turning said feed-screw, the latter screwingin a nut I, secured to the outer end of the cylinder A. On the cylinderA is formed or secured a ratchetwheel J, engaged by a springpressed pawlK, held in a handle L, fulcrumed on the said cylinder between theratchet J and the inner end of the nut I. 7

Now it will be seen that when the carrier 0 is in an innermost positionthe cutting-edge of the cutter D is within the exterior surface of thecylinder A, and the latter can be readily inserted in the flue to becut, the outer end of the flue being engaged by the collar B. When thetwo are in this position, the operator revolves the cylinder A bymanipulating the arm L in the usual manner, so that the pawl K, byengaging a tooth of the ratchet wheel J, turns the cylinder A, while thehandle L is swung in one direction, and during the return or backwardmovement of the handle the pawl K glides over the teeth of theratchet-wheel. In turning the cylinder A the cutting-edge of the cutterD is moved on the inner surface of the flue and in a circle, and at thesame time the carrier C is fed outwardly by the operator turning thehandle H of the feed-screw G to move the wedge F inwardly within thecylinder A. Thus a turning movement is given to the carrier 0, carryingthe cutter D, and at the same time an out ward sliding motion isimparted to the said carrier by the action of the wedge F. The fine isthus cut by the cutting-edge of the cutter D, and when the fine isentirely out through the handle H is turned in the opposite direction,so as to move the wedge F outwardly and to cause an inward sliding ofthe carrier C by the action of the spring E. The cylinder A can then beconveniently removed from the cut flue, and the out parts of the fluecan be readily taken out of the flue-sheets.

By arranging the guideway A so that the cutter will move outwarddiagonally with relation to the axis of the cylinder it is found that apipe may be cut entirely through without the formation of a bur on theouter side, as happens when the ordinary cutters are used, so that thepipe may be easily removed through the opening in the tube-sheet, andthus rendering it unnecessary to split the pipe longitudinally before itcan be removed.

It will be seen that this tool is very simple and durable inconstruction, can be conveniently manipulated, and requirescomparatively little power.

It is understood that the cutter can be used on either side of thecylinder.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patent A flue cutter consisting of a cylindrical bodyportion having apassage extending longitudinally through it and having acounterpassage extending transversely through the body portion anddiagonally with relation to the longitudinal center thereof, the bodyportion having an annular ratchet-rim formed thereon and a reducedscrew-threaded end adjacent to said ratchet-rim, a cutter-carriermovable longitudinally through the transverse passage,-a cutter carriedby the cuttercarrier and having an aXis .out of parallel with thelongitudinal line of the body portion, the body portion having a recessin its side at a point adjacent to the transverse passage, a springlocated in said recess and engaging the cuttercarriei', a Wedge-shapedmandrel passed through an opening in the cutter-carrier andlongitudinally movable in the body portion, a nut held on the reducedscrew-threaded end of the body portion, a screw-feed cooperating withthe internal threads on the nut, an arm having a collar lying againstthe ratchet-rim and pressed by the nut, and a spring-pressed pawlcarried by the arm, the pawl cooperating with the teeth on theratchet-rim, substantially asdescribed.

JEREMIAH FITZPATRICK.

\Vitnesses:

JAMES G. YOUNG, TIMOTHY SEXToN.

